Our filly will be 3 mos old pretty soon. When she was born, she had low immunity levels which caused the Vet concern, so we watched and tended to her closely. We kept her and her mother in a small isolated lot until she was about 7 weeks old...when the Vet said it would be safe to introduce her to a larger area and was "out of the woods" so to speak. She has done great in the larger paddock since we've had her there...it's just her and mom and they have plenty of shade, grass, water trough and a shelter. She's normally pretty fiesty and loves to run and play. But these last couple days I've noticed a change (I think) in her. She just seems lethargic...when mom runs, she walks or sometimes trots but not very much. I hadnt noticed her laying down at all untill this morning after they had ate their grain, she layed down...head up...and then eventually layed on her side like she does when napping. I ran my fingers up her back the way the Vet showed me too, to see if she'd jump up...she has in the past...she perked up and sat up some but didnt try to get up. So I got my whip out and swung it close by her...little reaction....just perked up her ears but no change. Finally mom started to "dance" around and run, only then did I get her up on her feet...this after several minutes. She ran with mom a short distance and then stayed up to go eat hay w/her...but something just seems off. I can't pinpoint it...wondering if I may just be imagining things or something. She's eating completely normal...hay, grain and nursing. I've seen her drinking water too. And seen her poop too...it looks normal. I looked her over, didnt notice anything abnormal at all. She's up to date on shots and wormer. No runny nose or anything. The flies are bothering her a lot, I do know that. The temps here are comfortable...70's today but it's been very rainy...we live in the midwest...but it hasnt rained the last 2 days. So maybe I'm just freaking out over nothing. What do you think? Does slow behavior or being lethargic merit a problem in a foal necessarily?